MTV Movie Awards host Russell Brand was supposedly given no comedic limits on Sunday night, and even his ex-wife Katy Perry was fair game.

"The last time I hosted I did marry someone who was there, so I'm keeping my eyes open for a new wife tonight," Brand said, referring to when he met Perry at the MTV Video Music Awards in September 2009.

He also poked fun at Michael Fassbender's "huge, engorged talent" (Fassbender appeared full-frontal in "Shame"), and made an X-rated Bieber Fever joke. "Justin Bieber is so pretty that even if he was attacking me, I'd do a little orgasm," Brand joked. "It's his hair!"

But those weren't the only nervous laughter-inducing moments. Without Robert Pattinson by her side, Kristen Stewart ended up making out with herself; Mila Kunis got heckled; and what in the world was Brooke Hogan wearing? From Russell to K-Stew to Charlize Theron, let us know: What was the most awkward moment at the MTV Movie Awards?